Lecture 32 - 211 Fall 2009

Lecture 32 211 fall 2009

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Unformatted text preview: IV. Inference. A. Confidence Intervals for Population Mean. (Chapter 8) 8) B. Hypothesis Tests of Population Mean (Chapter 9) 9) 1. Basics of Hypothesis Testing 2. Errors, Terms and Conclusions 3. Hypothesis tests: Z-test or t-test (is σX known?) Zt4. Prob Values (P-values) (P5. Type I and Type II Error Probabilities 2. Terms, Errors, Conclusions. Terminology/Vocabulary: • Level of significance: The chance of rejecting a true null hypothesis – determines critical values. • Critical Values: delineate the rejection/nonrejection regions. • Rejection Region: The possible values for the test statistic that lead you to Reject H0. • Non-Rejection Region: The possible values for the test statistic that lead you to Fail to Reject H0. • Test Statistic: statistic used to determine whether the null hypothesis should be rejected, or not. • Type I and Type II Errors: “RR” or “FF”. 2. Terms, Errors, Conclusions. Terminology/Vocabulary: • Critical Values: the zα/2, t α/2, or X α / 2 values • De...
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This note was uploaded on 12/08/2011 for the course ECON 211 taught by Professor Daniellass during the Spring '11 term at UMass (Amherst).

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